book

Table 3.1: Logical operators.
Operator Meaning Evaluation
! not n/a
& and unconditional
^
exclusive or (a or b true
but not both)
unconditional
| or (a or b true) unconditional
&& and conditional
|| or (a or b true) conditional
The following code fragment illustrates the use of logical operators:
int a = 5, b = 4, c = 2, d = 3, e = 0;
if (! (a < b) ) {
System.out.println('' ! condition true");
}
if ( (a > b) & (c < d) ) {
System.out.println(" & condition true");
}
if ( (a > b) | (c < d) ) {
System.out.println(" | condition true");
}
if ( (a > b) ^ (c < d) ) {
System.out.println(" First ^ condition true");
} else {
System.out.println(" First ^ condition false");
}
if ( (a > b) ^ (d < c) ) {
System.out.println(" Second ^ condition true");
}
if ((true) | | (5/e == 0)) {
System.out.println(" Divide by 0 avoided");
}
if ((true) | (5/e == 0)) {
System.out.println(" Not printed");
}
This will output
> java TestLogicals
! condition true
& condition true
| condition true
First ^ condition false
Second ^ condition true